Hectograph



may 19, 1925.

Y J. D. ALEXANDER HECTOGRAPH Fild April' 11, 1924 2 Sheets-Sheet 1 gwomto Julian D. fllexander.

May 19, 1925.

J. D. ALEXANDER HECTOGRAPH Filed A ril 11, 1924 2 Sheets-Sheet 2 I Jwlknkor Julian p. fllexaladezt Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

JULIAN D. ALEXANDER, F ENGLEWOOD, COLORADO, ASSIGNOR TO ALEXANDER FILM COMPANY, A CORPORATION OF COLORADO.

HECTOGRAPH.

Application filed April 11, 1924. Serial No. 705,837.

To all whom it may concern:

Be it known that I, JULIAN D. ALEXAN- DER, a citizen of the United States, residing at Englewood, county of Arapahoe, and

State of Colorado, have invented certain new and useful Improvements in Hectographs; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to duplicators of the type known as hectographs.

It is the object of this invention to produce a duplicator which shall be so constructed that it can be operated at high speed and with a minimum amount of labor per unit quantity of work.

It is a further object of my invention to produce a device that will be semi-automatic in its operation, and which can be made and sold at moderate cost.

My invention, briefly described, consists of a frame having two parallel arms connected at one end by a transverse bar. A roller of rubber or some similar resilient material is rotatably connected to the ends of the arms. A roller of metal or of any other suitable material is rotatably mounted between the arms and is impelled toward the resilient roller by means of springs. A sheet metal supporting table is secured 'to the frame for the purpose of supporting the paper which is to be printed on. The apparatus is intended to be movedv back and forth over the surface of a gelatin pad. The paper is fed between the rollers during the rearward movement of the apparatus and is presseddown on the gelatin pad by the roller. On the forward movement of the apparatus, the rollers remove the paper from the pad. This operation is repeated until the desired number of copies have been made.

In order more fully and clearly to describe my invention, I shall have reference to the accompanying drawing in which the preferred embodiment thereof is illustrated, and in which:

Fig. 1 is a perspective View of the frame to which the pad is secured;

tangular recess or depression 3 in its upper I surface. 7 Metal strips 4 are secured to the top ofthe board and project over the vertical sides of the recess. The gelatin pad 2 can be slid into place in the recess and is held by the strips 4. A groove 5 extends along one edge of the recess and serves to guide the movements of the duplicator in the manner to be hereinafter described. The duplicator, to which my present application is directed, consists of a metal frame having parallel arms 6 and 7 connected by a bar 8. The adjacent surfaces of the arms have inclined shoulders9, which receive and support ametal plate 10 upon which the paper to be printed upon rests. This plate is held in place by means of screws 11. The lower end 12 of plate 10 is bent so as to be inclined at an angle to the plane of the plate, in the manner shown in Fig. 3. A piece of sheet rubber, rubberized cloth or some similar material 13 is secured to the upper surface of the part 12. One edge of plate 10 is bent at right angles and forms a guide 14 for one edge of the paper 15. An adjustable guide 16 is secured to the plate 10 by means of a screw 17 having a wing nut 18. Where narrow strips of paper are to be handled, the guide may be rotated 180 degrees from the position shown in Fig. 2. Rotatably secured to the ends of arms 6 and 7 is a roller 19 which is preferably made from resilient rubber secured to a metal shaft 20,although this is not essential, as it may be made of wood, metal, vulcanite or any other suitable substance.

The inner surfaces of the arms 6 and 7 are each provided with a rectangular recess 21, within which is slidably mounted a block 22, one end of which is provided with a bearing 23. A spring 24 extends from the block 22 to the abutment 25, which rests on the end of the adjusting screw 26 (Fig. 5). A roller 27 has its ends journaled in the blocks 22 and is forced toward the roller 19 by the action of the springs 24:. A handle 28 is secured to the transverse member 8. Pivotally secured to the outside of the arm 6 at point 29 is a guide member of a substantially semi-elliptical shape. The ends 30 of the guide member project downwardly below the surface of the pad 2 and enter the guide slot 5 (Figs. 3 and at). It is apparent that the gnid'e member whose ends travel in the slot 5, determines the path of the duplicator over the pad. The length of the slot 5 and the guide member are so related tothe length of the pad 2' that the roller 19 will never leave the surface of the pad.

The operation of my device is'as follows Let us assume that it is desired to duplicate certain written matter. An original copy is first made with hectograph ink. This copy is then laid face down on the surface of the pad and rubbed gently so as to get every part thereof in contact with the pad surface, after which it is removed. The writing is now transferred to the pad so thatif a clean piece of paper is placed on the pad and pressed into contact therewith, the written matter will appear thereon.

In order to properly position the original on the pad, it is preferal'ole to move the dupl icator to the extreme forward or lefthand position- (Figs. 2' and 3) then insert the copy between the rollers and move the duplicator rearwar'dly or to the right.- The copy will be fed downwardly by the rollers and will enter between the pad and the roller 19, which will press it downwardly into contact. with the surface of thepad (Fig. 3'). A reverse movement of the duplicator will remove the copy fron'ithe pad. After the" pad has received its impression from the original, the duplicator is moved to the extreme left. One sheet of paper is theninserted: between the rollers and the duplicator moved toward the right. This feeds the sheet of paper onto the pad surface, where itis pressed dewnwardly by the roller 1 9. 'lVhen the duplicator is moved toward the left the paper is removed from the pad; Owing to the slight adhesion of the paper to the roller, the paper is repeated. A skillful operator can keep the duplicator in continuous motion and turn out a large number of copies in a short time.-

Having now described my invention, What I claim as new is: v

1 A duplicator comprising, in combination, a frame having two substantially parallel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the: plane of the axis of which intersects the roller, a bearing block slida-ble' in each of said slots, a second roller rota-tably mounted in said blocks, means com prising spring operatively associated with each block for producing aforce tending to move the last-named roller toward the firstnamed roller,- anda papersupportoperatively attached to said frame.

2. A duplicator comprising, in combination, a frame having two substantially par allel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the aX-isof which intersects the roller, a bearing block slidable in each of said slots, a second roller rotatably mounted in said blocks, means comprisa spring operatively associated with each block for producing a force tending to move the last-named roller toward the first-named roller, and a paper support operatively attached to said frame, said support comprising a: plate having one side bent at right angles; to form a paper guide.-

A duplicator comprising, in" combination, a frame having two substantially parallel armsspaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a bearing block slid able in each of said slots, a second roller rotatably mounted in said blocks, means comprising a spring operativel'y associated with each block for producing a force tending. to move the last-namedroller toward the firstnamed roller, and a paper support operatively attacl-ied to said frame, said support comprising a plate having one side bent at right angles to form a paper guide and having its lower end bent at an angle to the mainbody portion thereof.

4. A duplicator comprising, in combination, a frame having two substantially parallel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a bearing block slidable in each of said slots, a second roller rotatably mounted in said blocks, means comprising a spring operatively associated with each block for producing a force tending to move the last-named roller toward the firstnamed roller, and a guide member pivotally connected to one of said arms.

5. A duplicator comprising, in combination, a frame having two substantially par allel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a. bearing block slidable in each of said slots, a second roller rotatably mounted in said blocks, means com prising a spring operatively associated with each block for producing a force tending to move the last-named roller toward thefirst-named roller, a guide member pivotally connected to one of said arms, and a paper support operatively attached to said frame.

6. A duplicator comprising, in combina tion, a frame having two substantially parallel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a bearing bloc-k slidable in each of said slots, a second roller rotatably mounted in said blocks, means comprising a spring operatively associated with each block for producing a force tending to move the lastnamed roller toward the firstsnamed roller, means for adjusting the tension of said spring, and a paper support operatively attached to said frame.

7. A duplicator comprising, in combination, a frame having two substantially parallel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a bearing block slidable in each of said slots, a second roller rotatably mounted in said blocks, means comprising a spring operatively associated with each block for producing a force tending to move the last-named roller toward the firstnamed roller, means for adjusting the tension of said spring, a guide member pivotally attached to one of said arms, and a pa per support operatively associated with said frame.

8. A duplicator comprising, in combination, a frame having two substantially par allel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a bearing block slidable in each of said slots, a second roller rotatably mounted in said blocks, means comprising a spring operatively associated with each block for producing a force tending to move the last-named roller toward the first-named roller, means for adjusting the tension of said spring, a guide member pivotally attached to one of said arms, and a paper support operatively associated with said frame, said support having one side bent upwardly at right angles to the body portion to form a paper guide and the lower end inclined at an angle to the body portion.

9. A duplicator comprising, in combination, a frame having two substantially parallel arms spaced from each other and connected at one end by means of a transverse member, a roller pivotally connected to the other ends of said arms, the adjacent sides of the arms being each provided with an elongated slot, the plane of the axis of which intersects the roller, a bearing block slidable in each of said slots, a second roller rotatably mounted in said blocks, means comprising a spring operatively associated with each block for producing a force tending to move the last-named roller toward the first-named roller, means for adjusting the tension of said spring, a guide member pivotally attached to one of said arms, and a paper support operatively associated with said frame, said support having one side bent upwardly at right angles to the body portion to form a paper guide and the lower end inclined at an angle to the body portion, said inclined portion having a fabric containing rubber attached to the upper surface thereof.

In testimony whereof I aflix my signature.

JULIAN D. ALEXANDER. 

